Soaring demand and soaring prices for tuna on the global market has sent fishing through the roof. It's also led to a dramatic decline in tuna populations. The waters off a handful of central Pacific islands have the only remaining healthy populations -- and those are coming under threat now too.

Soaring demand and soaring prices for tuna on the global market has sent fishing through the roof. It's also led to a dramatic decline in tuna populations. The waters off a handful of central Pacific islands have the only remaining healthy populations -- and those are coming under threat now too.

Soaring demand and soaring prices for tuna on the global market has sent fishing through the roof. It's also led to a dramatic decline in tuna populations. The waters off a handful of central Pacific islands have the only remaining healthy populations -- and those are coming under threat now too.